If you want the gory details here's the Supreme Courts opinion in the case that allowed it: South Dakota v. Wayfar, Inc., et al. [1]. [1] https://www.supremeco

If you want the gory details here's the Supreme Courts opinion in the case that allowed it: South Dakota v. Wayfar, Inc., et al. [1]. [1] https://www.supremecourt.gov/opinions/17pdf/17-494_j4el.pdf https://www.supremecourt.gov/opinions/17pdf/17-494_j4el.pdf